Pro Series LSX Cylinder Head 12-point Stud Kit

• 35 chromoly studs deliver stronger clamping for LSX/LS-based cylinder heads

• 12-point head style for consistent, repeatable torque-down

• Fits LSX and aftermarket LS-based blocks — verify port style before ordering

• Engineered for stroker, drag, and high-horsepower LS-based builds

Upgrade your LSX or aftermarket LS-based engine with this Pro Series 12-point stud kit, built from 35 chromoly steel with a black finish. Stud-style fasteners provide stronger, more consistent clamping force than factory-style bolts, helping support reliable head gasket sealing under the higher cylinder pressure of stroker, drag, street/strip, and high-horsepower LS-based builds.

This kit is designed for LSX and aftermarket LS-based cylinder head stud applications — verify whether your heads use a cathedral or rectangular port design before ordering, since stud requirements can differ between the two. It is not compatible with Gen V LT direct-injection engines, Gen I small block Chevy, or Big Block Chevy engines unless specifically confirmed.

Before installation, verify block thread depth, cylinder head casting, gasket thickness, and manufacturer torque requirements, since these vary by aftermarket head brand and build combination.

Applications
Fits GM LSX and aftermarket LS-based V8 engine platforms, including LS-based stroker and performance builds. Common on Chevrolet Camaro/Corvette LSX performance builds, GM truck and SUV LSX swap applications, and drag, street/strip, and high-horsepower LS-based builds. Not compatible with Gen V LT direct-injection, Gen I small block Chevy, or Big Block Chevy engines unless specifically confirmed.

Installation
Verify cathedral or rectangular port style before ordering. Confirm block thread depth, cylinder head casting, gasket thickness, and manufacturer torque requirements before installation, since these vary by aftermarket head brand.

Will this fit a cathedral port or rectangular port LS head?
Both cathedral and rectangular port heads may be used in LSX/aftermarket LS-based builds, but port shape alone does not determine stud compatibility. Verify your specific block and cylinder head casting before ordering.

Does this work with a Gen V LT engine (direct injection)?
No. This kit is designed for LSX/LS-based applications and is not compatible with Gen V LT direct-injection engines.

Will this fit a Gen I Small Block Chevy or Big Block Chevy?
No. This kit is designed for LSX/LS-based platforms and is not compatible with Gen I Small Block Chevy or Big Block Chevy engines.

What tool do I need to install these studs?
The kit uses 12-point nuts, which require the appropriately sized 12-point socket for installation.

Will these studs work in a high-horsepower or stroker build?
Yes. The stud design provides consistent cylinder head clamping, making the kit suitable for performance, stroker, and high-horsepower LS-based builds when properly installed.

What do I need to check before installing this kit?
Verify the block thread size and depth, cylinder head casting, gasket configuration, lubricant, and required torque procedure for your specific combination before installation.

What material are these studs made from?
35 chromoly steel with a black finish and 12-point hardware.